1. Command Overview 🔍 1. top command: Real-time system monitoring 🌟 2. htop command: Enhanced system monitoring 💾 3. free command: Memory usage 💽 4. df command: Disk space check 📁 5. du command: Directory size analysis ⚡ 6. iostat command: I/O performance monitoring 📊 7. vmstat command: Virtual memory statistics 🌐 8. netstat command: … Read more
The Ultimate Guide to Disk IO Monitoring in Linux: From iostat to iotop 🚀 When the system lags, database queries slow down, or file transfers take too long, the issue often lies with disk IO. Master these IO monitoring tools to uncover performance bottlenecks! 🔍 Disk IO: A Key Dimension of Performance Analysis In the … Read more
💥 Ansible Firefighting Hotline | Is OS Performance Analysis Too Complicated? One-Click PCP Automated Inspection Turns You into a Performance Expert! Are you still struggling with system performance analysis? Manually running a bunch of commands like top, iostat, vmstat, free… leads to scattered information that is hard to integrate, and you might miss key metrics. … Read more
For Java developers, mastering basic Linux system administration skills is essential. Whether it is deploying applications, troubleshooting issues, or performance tuning, interaction with the Linux system is necessary. This article will introduce the fundamental knowledge and practical skills of Linux system administration that Java developers must master. 1. Basic Concepts of Linux 1.1 Linux System … Read more
When conducting high-concurrency and high-complexity testing tasks, if the testing tool itself has performance bottlenecks, hidden faults, or uncontrolled resource consumption, it often leads to unreliable results. Therefore, a professional testing instrument must possess the ability to be “self-monitoring”, ensuring that the testing process itself is transparent and controllable. Our HTTP(S) application layer tester is … Read more
🚀 Essential Linux Command Collection for Big Data Development: A Must-Read Guide for Programmers! In big data development, Linux is our “fighter jet”.Core components like Hadoop, Hive, Kafka, Flink, and Spark all run in a Linux environment.If you are not familiar with Linux commands, troubleshooting issues, optimizing performance, or even simple data file operations can … Read more
Reading time required 5 minutes Speed reading only takes 2 minutes Introduction With the continuous development of automation control technology, PLCs (Programmable Logic Controllers) play an important role in industrial production. The real-time performance of PLC control systems, especially the calculation of cycle time, is crucial for optimizing system performance, improving control accuracy, and response … Read more
Recently, I have been working on modifying and migrating several scheduled task scripts, so I took the opportunity to review my knowledge of cron and systemd timers, summarizing it into a series of articles. Interested readers can click the links below to read the original articles. Thank you for your support. Detailed Explanation of cron … Read more
<span>top</span> is one of the most frequently used commands by operations engineers. It acts like an electrocardiogram for the system, allowing you to grasp the overall health of the machine within seconds. Today, we will thoroughly dissect this “classic tool that has stood the test of time”. 1. Applicable Scenarios: When to Use top? • … Read more
CPU usageis essentially the CPU resources consumed by the programs you are running, indicating the status of your machine’s running programs at a certain point in time. A higher usageindicates that your machine is running many programs at that time, while a lower usage indicates fewer programs. In the previous article, we discussed how to … Read more